This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A080657 #3 Feb 24 2006 03:00:00 %S A080657 1,3674160,43252003274489856000, %T A080657 7401196841564901869874093974498574336000000000 %N A080657 Duplicate of A075152. %K A080657 dead %O A080657 1,2